Pressure and vacuum gage.



F. SCHUBERT. PRESSURE AND VACUUM GAGE. APPLIUATION FILED APR. .10, 1909.

*ywassas! W INVENTOIZ Fafiented Jan. 6, 1914-.

rnnnnmon scanner, or sELLnnsvrLLn, PENNSYLVANIA.

r PRESSURE AND 1,083,902. 7 Specification of Application filed April 10,

2 To all whom it may concern: I I .Be it known that I, FRED RICK; SoHUnnRT,

a citizen of the United States, and resident of Sellersville,- in the county of Bucks and State of Pennsylvania, have invented certain .new and useful Improvements in Pressure and Vacuum Gages, of which the following isa specification.

Myzinvention relates to spring pressure or vacuum gages, the object being the production ofsuch a gage by employing an adjustable eccentric whereby a: uniform scale canbe adopted.

In theaccom'panying drawings, Figural is a front elevation of my invention, the dial andindicator being brokenaway. for clearnessof illustration. Fig. 2 is a side View of myimproved adjustable eccentric in tively contracted and extended.

a contracted position. Fig. 3 is a similar view with the eccentric extended. Figs. 4 and 5 is a modified eccentric shown respec-' Similar reference characters refer to like parts in the several views.

The body oi casel has the usual Bourdon spring 2 mounted on a .post 3 having s1iit- I able connection 4. The bezel'5 holds glass in place on the case. zThe dial'or scale 6 is held in'position by means of screws 7. To the other end of the Bourdon spring 2, one end of a link 8 is pivotally-connected, the other end of said link being pivotally-connected to one end of a lever 9 formed of materizilhaving sufiicicnt rigidity for the p'ur-q pose desired, butivhich is capable of being bent at a point orpointsbetween its ends soas to providefor regulation in the travel of. the indicator. j

Within the body or case 1 is a supporting frame 11, preferably as shown substantially 'U-shape, and-whichca'n be readily formed from a strap of metal to reduce cost .of manufacture. This frame is suitably secured'to the body or case l-asby screws 12 and lies horizontally-disposed. above the post 3. 'In theframe is mounted the 10='which carvnomm GAGE.

Letters Patent.

1908. Serial No. 426,248.

' Patented Jan.6, 1914.

ries the indicator 13. The other end of the bendable lever 9 is suitably secured as by solder or otherwise to said pin 10, betweenthe arms of the frame 11. Such being the construction the operation is as follows When all the parts are assembled, the in-.

dicator is set at thezero mark, and the gage is tested with a standard gage. To make the indicator travel faster or slower so as to caliber correctly on the scale, the lever 9 is either contracted or extended, that is to say, the free end of, the lever to which the link 8 is connected is brought nearer to or farther away, from .the pin, 10, whereby the radius is varied for accomplishing this purpose.

Heretofore, where an eccentric of a fixed radius was used, it Was'necessary to select a link of the proper length so as to have the indicator at zero, and then to lay out each individual scale to suit the conditions. By usingthe bendable lever, scales of a uniform, predetermined.calibration can be used, and the eccentric adjusted so that the pressure or vacuum is correctly'indicated on the dial. lVhat I claim is- 4 In a pressure gage, a Bourdon spring, a substantially U-shaped supporting frame, a pin journaled in thctarms of said frame and carrying an indicator, a link pivotally connected at one end to thefree end of the Bourdon spring, an angularly bentlev-er fixedly connected at one end to said-pin and-at its other cnilpivotally connected to the other end of said link, said bcnt .le'ver being bendable between its ends in a direction 'substantially at right angles to tliedirection'of stress ofth'e .Bourdon spring for varying' the leverage thereof, the strain being across ,the angular bend of saidlever.

Signed at Sellersville in thecounty of HENRY T WILLIAMS. 

